HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 881
HD6412332
Manufacturer Part Number
HD6412332
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412332.pdf
(1244 pages)
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Crystal Resonator: Figure 20.3 shows the equivalent circuit of the crystal resonator. Use a crystal
resonator that has the characteristics shown in table 20.3 and the same resonance frequency as the
system clock (φ).
Table 20.3 Crystal Resonator Characteristics
Frequency (MHz)
R
C
Notes on Board Design: When a crystal resonator is connected, the following points should be
noted:
Other signal lines should be routed away from the oscillator circuit to prevent induction from
interfering with correct oscillation. See figure 20.4.
When designing the board, place the crystal resonator and its load capacitors as close as possible
to the XTAL and EXTAL pins.
S
0
max (pF)
max (Ω)
XTAL
Avoid
Figure 20.3 Crystal Resonator Equivalent Circuit
Figure 20.4 Example of Incorrect Board Design
2
500
7
C
C
L2
L1
L
Signal A Signal B
4
120
7
C
C
L
0
8
80
7
AT-cut parallel-resonance type
R
s
Rev.4.00 Sep. 07, 2007 Page 851 of 1210
Chip
12
60
7
XTAL
EXTAL
EXTAL
16
50
7
20
40
7
REJ09B0245-0400
25
40
7
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